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(No Model.) r A. DORMITZBR. WINDOW CLEANING CHAIR.

No. 293,423. Patented Feb. 12, 1884.

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UNITED STATES ATENT Brion.

ANNA DonMrrznR, OF NEW Y RK, N. Y.

WINDOW-CLEANING CHAIR.

SFfiGIFI CATIONforming part of Letters Patent No. 293,428, dated February 12, 1884:.

ing windows described in the several Letters Patent of the United States heretofore granted to me, andwhich are numbered200, 441, 206, 935, 206,936, 219,234, 244,203, and 256,654., and

has for its object a simplification in the construction of the chair, and inthe devices for its secure attachment to a window-sill.

My improvements consist in fitting to the under side of the chair an adjustable brace or clamp adapted to engage the outer face of the window-sill, constructed with a wide base to afford a firm and rigid support to the clamp, so that it may not yield when made to bear against the sill, said base being left free to be moved back and forth for adjustment against the sill to and from the front edge of the chair by means of asorew engaging a traveling nut the clampby means of a transverse rod coupling them therewith. I furthermore detach the auxiliary step which has heretofore been hinged or otherwise coupled with the main step of the chair, and fit it with tenons to enter mortises in the chair and front step, so that said auxiliary step may be used interchangeably, either in connection with the inner or the outer end of the chair, and be also stowed away on the stepwhen not inuse. I My chair is thus reducedto the simple form of a seat made to fit over and project from the sill, a fixed stay-frame adapted to drop from the seat on the inner side of the sill to bear against the inside wall, and furnished with a stepby which to mount up on the chair, an outer clamp; to fit against the outer edge of the sill and bind the chair firmly in position, and in- Application filed December 4, 1883. No model.)

clinedfaced blocks moving in unison with the clamp to rest on top'of the sill and supply an adjustable even bearing for the chair thereupon.

a View in perspective of the under side of the chair whenopened out ready to be-placed in position in the window; Fig. 2, a sectional side elevation of the chair adjusted in position upon the window-sill, with the auxiliary step in position on its inner end, the position. of the step, both when on the outer end and when stowed on the main step, being indicated by dotted lines; Fig. 3, a transverse sec tion View in line at w of Fig. 2, looking outward toward the clamp; Fig. 4, a detached view, 011 an enlarged scale, of the outer clamping-piece. H

The seat or platform of the chair is designated by the letter A. It is constructed of astrong frame,.covered, by preference, with a sheet of light veneered stuff. The frame is re-enforced at its outer rear edge bya strip, 13, which projects up above the level of the frame, and serves to give support to the lower edge of aback piece or guard, D, hinged to the seat to fold down inwardly thereon between two side guards, E E, which are each hinged to a side strip on the edge of the platform'high enough to allow of their folding inward upon the top of the rear guard, D, when it lies fiat on the seat. When turned up, the side guards are supported by the interposed rear piece, D, which in turn receives support at its upper end against lugs projecting slightly from the In the accompanying drawings, Flgure 1 is inner rear edgesof the side guards, E E, near opened out from under the seat, is adapted to.

serveas a stayfor the same against the inner face of the wall, on the inside of the window. Its length is such as to give a wide, firm support to the seat, which will serve effectually.

in preventing it from tipping outward as it suitable brackets, H H and by means there-' of a person may readily mount upon the seat or platform A when the chair is adjusted in the window.

Upon the under side of the seat or platform, and 011 each side of its central bar, 1), two

blocks, K K, are fitted to slide longitudinally in direction from front to rear in ways formed by and between the central bar, 12, and parallel cleats c c on either side thereof. To these blocks a clamping plate or support, K, is rigidly secured, so as to project therefrom at a right angle with the seat, and this plate is braced onthe rear by angleblocks e e, fitted to the blocks and plate, as shown in Fig. 4. These blocks K K not only permit the clamping-plate K to slide for adjustment to and from the front of the seat, but by their length afford an extended base or bearing for the inner end of the clamp against the under side of the seat. thus rigidly secured to the sliding blocks, so as to project at a right angle, or thereabout, from the seat, is preferably curved or bent inward toward the front of the seat, to give it a firmer .hold against thewall or window-sill when applied thereto.

lateral strips, ff.

Upon either side of the frame of the seat or platform A plates or block M M are fitted to.slide longitudinally upon its side bars and .7 to project downward therefrom. They are confined upon the side bars as they traverse there on by means of parallel rods N N, secured at either end to the frame, and which extend longitudinally over theupper end of the blocks,

. and fit each into a longitudinal groove in the face thereof, as shown in Fig. 1 of the drawings. The lower face of each block M ismade to slope upward toward the inner end of the seat, and the two blocks are united, so as to move simultaneously in unison with each other and with the central clamp, K, by means of a transverse connecting-rod, P, whose ends project through transverse apertures in the side blocks, and which is made fast centrally to the inner face of the clamp K, as shown in Fig. 1.

. In the use of the chair thus sim ply construct-- ed the platform or seat is placed upon the The lower end of this clamp K,

window-sill,anditsfront supportorstay-frame, H H, let down at a right angle theretd, is made to bear against the inner face of the wall under the window, on the inside thereof, a firm bearing being obtained against the wall, irrespective of the inward projection of the sill beyond its face, by means of the pad-blocks H H. (See Fig. 2.) The clamp K and the side blocks, M M, moving with it are then drawn inward by turning the thumb-screw L until the side blocks obtain a firm, evenbearing on the window-sill, and the lower end of the central clamp is brought to bear against the outer face of the sill or wall. The operation of the screw will permit the clamp to be so tightened up against the wall as to lock the chair firmly and securely to the sill.

The step H facilitates the ready use of the chair, and the folding guards D E E, being turned up, supply a complete back to the chair, adding to the safety of its use by preventing the accidental fall therefrom of a person seated thereon. To facilitate its use in reaching the extreme upper portion of the window when required, I supply therewith a detachable step, R, whose feet or four lower corners are provided with projecting dowels or tenons adapted to fit into counterpart mortises or .recesses inthe side bars of the platform,both at its inner end, to admit of the use ofithe auxiliary step within the window, (see Fig. 1,) and also at about the center thereof, to admit of its use on the outside. (See dotted lines, Fig. 2.) The upper face of the main step H is also provided with counterpart recesses to engage the dowels of the auxiliary step B, so that when the chair is folded up this auxiliary step may be fitted upon the main step, (see dotted lines, Fig. 2,) and with it folded away under the platform or seat of the chair.

The equipment of the chair for domestic use is completed by means of a vessel, U, divided into two compartments, one higher than the other, and adapted the one to hold water and the other wash-rags, &c., for cleaning the window. This convenient vessel is adapted to hook onto the side guards of the chair .or

upon a rod, T, fitted in a socket in the seatframe.

What I claim as newherein, and desireto secure by Letters Patent, is

1. An unyielding clamp projecting rigidly from blocks traversing in ways upon thev under side of the platform of a window-cleaning chair, in combination with its stay-frame, a thumb screw extending under the platform from its front rearwardly, and a traveling nut' upon said screw coupled to the clamp, sub v front to rear, and to engage the outer face of. the sill or wall, and which is provided witha thumb-screw adapted to produce an adjust:

ment of said clamp, of lateral inclined-faced In testimony whereof I have signed my name blocks traversing longitudinally upon the sides to this specification in the presence of two subto of the platform, to rest upon the Window-sill, scribing Witnesses. and a transverse connecting-bar coupling said blocks with each other and the central clamp, ANNA DORMITZER' so that the three shall move in unison, sub- YVitnesses: stantially in the manner and for the purpose G. M. WOODCOCK,

herein set forth.

A. B. MOORE. 

